Oregon Zoo penguins back home after home improvements

Thursday, November 15, 2012 8:01 PM

PORTLAND, OREGON - November 15, 2012 - Humboldt penguins at the Oregon Zoo have moved back into their Penguinarium which has had an upgrade to its water filtration system and heating and air conditioning systems. For the last two years they have been in a modified area in the polar bear habitat. Brent Wojahn/The Oregonian